[PATCH 11/18] ASoC: SOF: Intel: hda-mlink: add helpers to enable/check interrupts

[Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>]

From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>

When INTC is set, LCTL exposes INTEN and INTSTS fields.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
---
 include/sound/hda-mlink.h       |  8 +++++
 sound/soc/sof/intel/hda-mlink.c | 62 +++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)

diff --git a/include/sound/hda-mlink.h b/include/sound/hda-mlink.h
index b8f889fa46c4..ebc7c5b07557 100644
--- a/include/sound/hda-mlink.h
+++ b/include/sound/hda-mlink.h
@@ -14,6 +14,8 @@ int hda_bus_ml_get_capabilities(struct hdac_bus *bus);
 void hda_bus_ml_free(struct hdac_bus *bus);
 
 int hdac_bus_eml_get_count(struct hdac_bus *bus, bool alt, int elid);
+void hdac_bus_eml_enable_interrupt(struct hdac_bus *bus, bool alt, int elid, bool enable);
+bool hdac_bus_eml_check_interrupt(struct hdac_bus *bus, bool alt, int elid);
 
 int hdac_bus_eml_power_up(struct hdac_bus *bus, bool alt, int elid, int sublink);
 int hdac_bus_eml_power_up_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink);
@@ -39,6 +41,12 @@ static inline void hda_bus_ml_free(struct hdac_bus *bus) { }
 static inline int
 hdac_bus_eml_get_count(struct hdac_bus *bus, bool alt, int elid) { return 0; }
 
+static inline void
+hdac_bus_eml_enable_interrupt(struct hdac_bus *bus, bool alt, int elid, bool enable) { }
+
+static inline bool
+hdac_bus_eml_check_interrupt(struct hdac_bus *bus, bool alt, int elid) { return false; }
+
 static inline int
 hdac_bus_eml_power_up(struct hdac_bus *bus, bool alt, int elid, int sublink)
 {
diff --git a/sound/soc/sof/intel/hda-mlink.c b/sound/soc/sof/intel/hda-mlink.c
index 93d532acd1c2..cd5bbfa3684d 100644
--- a/sound/soc/sof/intel/hda-mlink.c
+++ b/sound/soc/sof/intel/hda-mlink.c
@@ -232,6 +232,28 @@ static int hdaml_link_shutdown(u32 __iomem *lctl, int sublink)
 	return check_power_active(lctl, sublink, false);
 }
 
+static void hdaml_link_enable_interrupt(u32 __iomem *lctl, bool enable)
+{
+	u32 val;
+
+	val = readl(lctl);
+	if (enable)
+		val |= AZX_ML_LCTL_INTEN;
+	else
+		val &= ~AZX_ML_LCTL_INTEN;
+
+	writel(val, lctl);
+}
+
+static bool hdaml_link_check_interrupt(u32 __iomem *lctl)
+{
+	u32 val;
+
+	val = readl(lctl);
+
+	return val & AZX_ML_LCTL_INTSTS;
+}
+
 /* END HDAML section */
 
 static int hda_ml_alloc_h2link(struct hdac_bus *bus, int index)
@@ -340,6 +362,46 @@ int hdac_bus_eml_get_count(struct hdac_bus *bus, bool alt, int elid)
 }
 EXPORT_SYMBOL_NS(hdac_bus_eml_get_count, SND_SOC_SOF_HDA_MLINK);
 
+void hdac_bus_eml_enable_interrupt(struct hdac_bus *bus, bool alt, int elid, bool enable)
+{
+	struct hdac_ext2_link *h2link;
+	struct hdac_ext_link *hlink;
+
+	h2link = find_ext2_link(bus, alt, elid);
+	if (!h2link)
+		return;
+
+	if (!h2link->intc)
+		return;
+
+	hlink = &h2link->hext_link;
+
+	mutex_lock(&h2link->eml_lock);
+
+	hdaml_link_enable_interrupt(hlink->ml_addr + AZX_REG_ML_LCTL, enable);
+
+	mutex_unlock(&h2link->eml_lock);
+}
+EXPORT_SYMBOL_NS(hdac_bus_eml_enable_interrupt, SND_SOC_SOF_HDA_MLINK);
+
+bool hdac_bus_eml_check_interrupt(struct hdac_bus *bus, bool alt, int elid)
+{
+	struct hdac_ext2_link *h2link;
+	struct hdac_ext_link *hlink;
+
+	h2link = find_ext2_link(bus, alt, elid);
+	if (!h2link)
+		return false;
+
+	if (!h2link->intc)
+		return false;
+
+	hlink = &h2link->hext_link;
+
+	return hdaml_link_check_interrupt(hlink->ml_addr + AZX_REG_ML_LCTL);
+}
+EXPORT_SYMBOL_NS(hdac_bus_eml_check_interrupt, SND_SOC_SOF_HDA_MLINK);
+
 static int hdac_bus_eml_power_up_base(struct hdac_bus *bus, bool alt, int elid, int sublink,
 				      bool eml_lock)
 {
-- 
2.40.0